42737731 has 2 divisors, whose sum is σ = 42737732. Its totient is φ = 42737730.

The previous prime is 42737729. The next prime is 42737753. The reversal of 42737731 is 13773724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42737731 - 2¹ = 42737729 is a prime.

It is a super-2 number, since 2×42737731² = 3653027302056722, which contains 22 as substring.

Together with 42737729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42737791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21368865 + 21368866.

It is an arithmetic number, because the mean of its divisors is an integer number (21368866).

Almost surely, 2^42737731 is an apocalyptic number.

42737731 is a deficient number, since it is larger than the sum of its proper divisors (1).

42737731 is an equidigital number, since it uses as much as digits as its factorization.

42737731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 34.

The square root of 42737731 is about 6537.4101141048. The cubic root of 42737731 is about 349.6260795782.

The spelling of 42737731 in words is "forty-two million, seven hundred thirty-seven thousand, seven hundred thirty-one".